Rural Energy Development Programme (REDP)

    Foreword

    Table Of Contents

    1. Background

    2. History and Development of Solar Water Heaters in Nepal

    3. Promotion of Solar Water Heater System in Nepal

    4. Why Promote Solar Water Heater in Nepal?

    5. Potential and limitations of growth

    6. Market Situation of SWHs in Nepal

    7. Solar Water Heater
        Assessment
          Components of a Collector
            Absorber Plate
            Types of Absorber Plate
            Insulation
            Cover Plate
            Casing

          Types of Collectors
          1. Serpentine type
          2. Harp type

          Flow pattern in Collector

          Collector Array

          Energy losses in collector
            Improving Efficiency of a Flat-Plate Collector

          Selective Coatings

          Other types of Collectors
          1. Glass Evacuated Tubes (Vacuum Tubes)
          2. Heat Pipe Evacuated Tube System
          3. Concentrating Collectors

        Circulation Pipes

        Hot Water Storage Tank
          Shape
          Types

        Electric Boosting
          Location of Electric Booster

    8. Types of Solar Water Heater
      1. Natural Circulation Type of System
      2. Forced Circulation or Pumped System

    9. Working of Expansion Vessel

    10. Proper Sizing of WSH
        Hot Water Requirements

    11. Installation of a Solar Water Heater
        Collector Spacing

        Preparation for Collectors for Glazing

        Installation on the Ground
          Hail Screen

        Angle and Direction of Collectors
          Angle of Collectors
          Correcting Factors
          Direction of Collector
          Correcting Factor (Direction)

        Installing in Freezing Climate

    12. Vantilation

    13. Cost and Benifits of Solar Hot Water Systems

    14. Market Potential

    15. Macro-Economical Benifits

    16. Factor for Success Marketing

    17. Flaws and Fults

    18. Beyond Hot Water
        Solar passive space heating
        Solar cooling
        Swimming pool heating
        Solar electricity
        Solar desalination/water purification
        Solar drying
        Solar cooking
        Solar refrigeration

    Annex: I
    Annex: II
    Annex: III
    Annex: IV
    Annex: V
    Annex: VI
    References


Advisor:
Kiran Man Singh,
National Programme Manager

Written by:
 
 

Rural Energy Development Programme
P.O. Box: 107, Pulchowk, Lalitpur
Phone : 520048
Fax : + 977-1-521547
E-mail : redpktm@mos.com.np

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